Prefabricated building prices

Are you still happy in your home, but is it starting to get a bit small due to family expansion, for example? Then a prefabricated extension could be the answer for you. When you choose a prefabricated extension, the extension is made in the factory and moved to the site in its entirety, a cheap and quick way of house extension. It also fits in with the existing construction, creates little mess around the house and increases the value of your home. Want to know more about a prefabricated extension and its exact prices? Then read on quickly.

Costs of a prefabricated annex

The costs of a prefabricated annex are generally lower than when building on site and the project is completed faster. The low costs are mainly due to saving labour on site. Different styles are also possible with prefabricated extensions, such as: standard, classic and modern. Below is a price indication of the different finishes and prices for a prefabricated extension.

Price examples

In the aforementioned price table, you can see an overview of average prices. Below are described examples which further explain the prices.

Most chosen work

The most chosen work is the most economical solution. This is because most people choose to have a prefabricated extension installed with no extras. When you have a limited budget, this is the best solution. For an extension of 5 metres by 3 metres, you pay an average of £18,000.

Greater project

With a larger project, everything is included. Think about the electrics, underfloor heating and a sliding door. Consider the average cost of £40,000.

Detailed project

If you opt for a smaller project of, say, 4 m2. Then a prefabricated extension is still the most economical way of remodelling. You will pay an average of £4,800 for a small prefabricated annex of 4 m2.

How does the price breakdown of a prefabricated annex look?

What choices affect the price?

With a prefabricated extension, the price is determined by 4 choices.

Choice 1: Prefabricated extension size

The size of the extension depends on your home and where the extension will be located. Prices for width and depth can vary quite a bit.

• Width: the width of a prefabricated extension can be up to 12 metres. Per half metre, you need to add an average price of £1,000.
• Depth: per half metre, depth is more expensive than when working in width. In fact, for half a metre more or less depth, an average price of £1,250 is charged.

Choice 2: Doors, windows and piles

Everyone has different tastes. That is why there are many different types of doors and windows. The choice of doors and windows affect the price and the atmosphere.

• Roof window: Do you want more light in your home? Then a skylight is the perfect option. It is possible to choose from 2 different types of skylights. A lectern or a saddle. For a skylight, you pay an average of £2,500.
• Windows: For more light and views, it is wise to install windows in the extension. An additional window costs on average £1,000.
• Sliding doors: Many people choose a sliding door in the extension. A sliding door provides lots of light and you involve the garden in your home. A sliding door adds £1,000 on average.
• Piles: Sometimes piles have to be used for a good foundation. It is not always necessary, but when it is needed you should think of an extra cost of £1,500 per two pieces. For an average extension you need 2 piles.

Choice 3: Additional option

As you have already read, you can make a prefabricated extension as expensive as you want. See below a number of options with average prices you can add to your project.